This fearless unit sneaks through enemy gates, isn't shot by shooting buildings and plants powerful explosives on enemy defensive buildings. However, Defenders Spawning Defensive Buildings can detect guerrillas and will spawn troops that can attack them. It is unlocked with level 2 Factory.

Infiltration tactics have been used in warfare for centuries.
They often involve independent light infantry moving into
vulnerable enemy positions, bypassing the front line and
striking to allow follow up attacks by additional troops or heavy
artillery. Planting explosives in vulnerable enemy positions is a
common infiltration tactic and C-4 is one of the most common
of these explosives used. C-4 is part of the plastic explosives
family, also known as Composition C. With the consistency of
modeling clay, C-4 can be shaped into any desired shape and
set off using a shock wave from a detonator.